China's National Highway G010, also called Tongsan Expressway (Tongjiang-Sanya Expressway), was an abolished national highway in China, which ran from Tongjiang in Heilongjiang to Sanya in Hainan. It was 5,700 km (3,500 mi) in length, the longest China National Highway at the time.[1]
It was part of the five north-south and seven east-west main routes in China. However, it has been abolished in 2010s, now being part of the G15 Shenyang–Haikou Expressway.[2]
China National Highway 112 runs around Beijing
Before 2013, Mainland China observed National Highway 228 as Taiwan Ring, composed of several National Expressway (Republic of China) and Taiwan provincial highways, this designation is not recognized by Republic of China (Taiwan). This observation was eventually dropped in new National Highway plans, replaced by Dandong-Dongxing Highway.
A extension plan of the highway system was announced in 2013, including extension of existing highways(101-112, 201-227, 301-330) and new highways (North-South 228-248, East-West 331-361, Connections 501-581). Only small portions of them needs to be constructed from scratch; most of the new highways would be upgraded provincial/county highways.
Another extension plan was announced in 2022, including new small purpose connection highways (601-701).